Penn, David L.; Meyer, PS; Evans, E; Wirth, RJ; Cai, K; Burchinal, M. Professional A randomized controlled trial of group cognitive-behavioral therapy vs. enhanced supportive therapy for auditory hallucinations. Schizophrenia Research. 2008, 109 (1-3): 52–59. PMID 19176275. doi:10.1016/j.schres.2008.12.009.
Penn, David L.; Meyer, PS; Evans, E; Wirth, RJ; Cai, K; Burchinal, M. Professional A randomized controlled trial of group cognitive-behavioral therapy vs. enhanced supportive therapy for auditory hallucinations. Schizophrenia Research. 2008, 109 (1-3): 52–59. PMID 19176275. doi:10.1016/j.schres.2008.12.009.